Hospital bed having communication modules

ABSTRACT

A system for use with a hospital bed having circuitry and a standard AC power outlet spaced from the hospital bed is provided. The system includes a cable assembly couplable to the circuitry of the hospital bed. The cable assembly has power conductors and at least one data conductor. The cable assembly also has a plug including a first power coupler coupled to the power conductors and a first data coupler coupled to the at least one data conductor. The system also includes a second data coupler mountable adjacent the standard AC power outlet. The second data coupler is configured to couple to the first data coupler when the first power coupler is coupled to the standard AC power outlet.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. application Ser. No.14/276,279, filed May 13, 2014, now U.S. Pat. No. 9,142,923, which is acontinuation of U.S. application Ser. No. 13/105,443, filed May 11,2011, now U.S. Pat. No. 8,727,804, which is a continuation of U.S.application Ser. No. 12/128,390, filed May 28, 2008, now U.S. Pat. No.8,272,892, which is a continuation of U.S. application Ser. No.10/568,918, filed Feb. 17, 2006, now U.S. Pat. No. 7,399,205, which is aU.S. national application under 37 C.F.R. §371(b) of InternationalApplication Serial No. PCT/US2004/026772 filed Aug. 19, 2004, whichclaims the benefit, under 35 U.S.C. §119(e), of U.S. Provisional PatentApplication Ser. No. 60/496,743 filed Aug. 21, 2003 and U.S. ProvisionalPatent Application Ser. No. 60/601,501 filed Aug. 13, 2004 each of theforegoing applications being hereby expressly incorporated by referenceherein.

BACKGROUND OF THE INVENTION

The present disclosure relates to connectors having wired and wirelesscouplings. The present disclosure also relates to apparatus fortransferring data from a hospital bed to a network of computer devicesin a healthcare facility, but has use in other applications and in otherenvironments as well.

Power plugs and/or power receptacles, such as standard 3-prong AC powerplugs and receptacles, having electrical and optical couplings areknown. See, for example, U.S. Pat. Nos. 6,533,466; 6,071,015; 5,967,840;5,696,861; and 4,767,181. Other types of plugs and receptacles havingelectrical and optical couplings that are also known. See, for example,U.S. Pat. Nos. 5,242,315; 5,109,452; 4,721,358; 4,678,264; 4,465,333;and 4,767,168.

Many devices have a need for both power and data. Typically, suchdevices have a power cord that couples to a standard power outlet orreceptacle and a separate data cable or cord that connects to a dataport or receptacle. Having two connections requires that both cablesmust be disconnected and then reconnected every time the device is movedto a new location. Data connectors or plugs usually have small connectorpins that may be damaged during connection or disconnection from anassociated receptacle.

In the healthcare environment, many hospital beds receive power fromstandard wall outlets which may be mounted to a room wall or otherarchitectural equipment, such as a headwall, a bed locator, a column, anarm, and so forth. Thus, a power cord extends between the hospital bedand the wall outlet. Many conventional hospital beds have a separatedata port or data cable that connects to a data port mounted to the roomwall, headwall, bed locator, etc. Thus, a data cable separate from thepower cord extends between the hospital bed and the associated data portor receptacle. Data from the hospital bed is communicated to a networkin the healthcare facility so that other computer devices connected tothe network have access to the data from the hospital bed. When such ahospital bed having a power cord and a separate data cable is to betransported to a new location, both the power cord and data cable aredisconnected from the associated receptacles prior to bed transport andare reconnected to associated receptacles at the new location.

SUMMARY OF THE INVENTION

A plug and/or a communication module and/or a system and/or an apparatushaving, or used with, such a plug and/or communication module isprovided and has one or more of the following features or combinationsthereof, which alone or in any combination may comprise patentablesubject matter:

The plug and/or communication module may be provided with both a wiredcoupler and a wireless coupler. The wired coupler may compriseelectrical contacts, such as electrically conductive prongs or socketsor portions thereof. The wireless coupler may comprise one or more ofthe following: a photoemitter, a photodetector, a photodiode, a radiofrequency (RF) transmitter, an RF receiver, an RF transceiver, aninfrared (IR) transmitter, an IR receiver, and an IR transceiver. Aportion of the wireless coupler may be included in a communicationmodule that attaches to a standard simplex or duplex power outlet. Datamay be wirelessly communicated in accordance with any known datatransfer protocol, including but not limited to protocols such as IrDA,spread spectrum (including the Bluetooth protocol), RS232, TCP/IP, USB,and 802.11_(X). The wireless data may be communicated by frequencymodulation, including frequency modulated infrared (FMIR).

Both power and data may be delivered via a single cable. Such a cablemay have a connector, such as a male plug or a female receptacle, at oneend or at both ends. Such a cable may include one or more power wiresand one or more data wires extending along the length of the cable. Thepower wires may couple to power prongs or power sockets of the plug. Thedata wires may couple to signal-processing circuitry which receives thedata via the data wires and transmits the data wirelessly afterprocessing the data. The plug may include a plug body which houses atleast some of the signal-processing circuitry. The signal-processingcircuitry may be integrated into a standard NEMA power cord and plug.The data may comprise any desired information including but not limitedto device status, audio, video, and telephony.

The plug and/or communication module may include, or may be coupled to,components for performing parallel-to-serial conversion,serial-to-parallel conversion, encoding, decoding, digital signalprocessing, compression and/or decompression (CODEC). The wirelesssignals communicated between the plug and communication module may bebidirectional signals. The wireless signals may include FMIR signalshaving different carrier frequencies. The wireless signal from the plugto the communication module may be a mixed signal containing a firstsignal that is frequency modulated at a first carrier frequency and asecond signal that is frequency modulated at a second frequency. Thewireless signal from the communication module to the plug may be a mixedsignal containing a third signal that is frequency modulated at a thirdcarrier frequency and a fourth signal that is frequency modulated at afourth carrier frequency.

The communication module may plug into a standard power receptacle. Thecommunication module may have both wired and wireless couplers. Thecommunication module may have a receptacle that receives a plug havingboth wired and wireless couplers. The communication module may have ahousing, a data cable extending from the housing, and power prongsextending from the housing. The power prongs may couple to a poweroutlet or receptacle. The data cable may couple to a data port orreceptacle that is spaced from the power outlet. The power outlet anddata port to which the communication module couples may be provided in ahealthcare facility on a room wall, on a headwall, on a bed locator, ona column, on an arm, or on any other architectural structure. The plugthat couples to the communication module may provide connectivity for ahospital bed to power and data. The communication module may include aport configured to couple to a connector of a hospital bed pendantcontroller and/or to a connector of a data cable extending from ahospital bed.

A method for installing and/or using a plug and/or a communicationmodule is also disclosed and has one or more of the following featuresor combinations thereof, which alone or in any combination may comprisepatentable subject matter:

The method may comprise coupling a combined power-and-data cable to adevice. The method may further comprise coupling a plug having awireless transceiver to a power outlet. The method may comprise placingnear the power outlet a communication module having a wirelesstransceiver that communicates with the wireless transceiver of the plug.The method may comprise coupling the communication module to a data portof the computer network.

Additional features, which alone or in combination with any otherfeature(s), such as those listed above, may comprise patentable subjectmatter and will become apparent to those skilled in the art uponconsideration of the following detailed description of variousembodiments exemplifying the best mode of carrying out the embodimentsas presently perceived.

BRIEF DESCRIPTION OF THE DRAWINGS

The detailed description particularly refers to the accompanying figuresin which:

FIG. 1 is a perspective view showing a hospital bed having apower-and-data cord terminating at a power-and-data plug that is pluggedinto a wall outlet, an outlet module adjacent the outlet forcommunicating wirelessly with circuitry carried by the plug, a wallmodule above the outlet module and coupled thereto by a data cord, and adata cable extending from the wall module to an interface unit of anurse call system which is located beneath a patient station of thenurse call system;

FIG. 2A is an exploded perspective view showing the outlet module havinga mounting plate which mounts over an existing outlet cover of a simplexoutlet, a housing which carries circuitry and couples to the mountingplate, the plug being insertable into the wall outlet through openingsin the mounting plate and housing, the power-and-data cord having ajunction body spaced from the plug, a combined data-and-power cordportion extending between the plug and the junction body, separate dataand power cord portions extending from the junction body, and the wallmodule having a circuit board which is received in a housing that ismountable to an electrical junction box;

FIG. 2B is a cross-sectional view, taken along line 2B-2B of FIG. 2A,showing the combined data-and-power portion having three powerconductors grouped together and a set of data conductors groupedtogether above the power conductors;

FIG. 3 is an enlarged exploded perspective view of a duplex wall outlet,the outlet module, and the plug;

FIG. 4 is an enlarged perspective view, similar to FIG. 3, showing themounting plate and housing of the outlet module coupled together, theplug inserted through the openings of the outlet module to plug into thewall outlet, and the housing of the outlet module having an upperportion that overhangs a portion of a plug body of the plug to permitwireless communication between circuitry carried by the plug body andcircuitry situated in the upper portion of the housing of the outletmodule;

FIG. 5 is a high-level block diagram of various electrical componentsincluded in the bed, included in a room, and other devices thatcommunicate with the electrical components included in the bed and theroom;

FIG. 6 is a block diagram map showing how to lay out FIGS. 6A-6C to forma block diagram of the circuitry of the bed;

FIG. 7 is a block diagram map showing how to lay out FIGS. 7A-7C to forma block diagram of the circuitry of the outlet module and the wallmodule;

FIG. 8 is a perspective view showing a hospital bed having analternative embodiment of a power-and-data cord terminating at apower-and-data plug that is plugged into a first outlet of a wall duplexoutlet, an alternative embodiment of an outlet module plugged into asecond outlet of the wall duplex outlet for communicating wirelesslywith circuitry carried by the plug, and a data cable extending from theoutlet module to a patient station of a nurse call system;

FIG. 9 is a front elevation view of the outlet module and the duplexwall outlet of FIG. 8;

FIG. 10 is a side elevation view of the duplex wall outlet, thepower-and-data plug, and the outlet module of FIG. 8;

FIG. 11 is a front elevation view of another alternative embodiment ofan outlet module showing the outlet module including a power outlet intowhich a power-and-data plug may be plugged to receive power and tocommunicate wirelessly with circuitry of the outlet module;

FIG. 12 is a side elevation view of the outlet module of FIG. 11 showingthe outlet module having power prongs (in phantom) that plug into a walloutlet (in phantom) to provide power to the power outlet included in theoutlet module; and

FIG. 13 is a perspective view of yet another embodiment in which apower-and-data plug couples to a wall outlet mounted to a headwall unitin a hospital room, an outlet module adjacent the wall outletcommunicating wirelessly with circuitry carried by the plug, the outletmodule coupled to an interface unit of a nurse call system by a datacable, and the interface unit being coupled to the headwall unitadjacent a patient station to the nurse call system.

DETAILED DESCRIPTION OF THE DRAWINGS

A power-and-data plug 20 which receives power for a device 22 alsoincludes circuitry 24 for communicating wirelessly with a firstcommunication module 26 that is mounted adjacent a standard AC poweroutlet or receptacle 28 as shown in FIGS. 1, 2A, and 3. The words“outlet” and “receptacle” are used interchangeably in this disclosure.In the illustrative example, device 22 is a patient-support apparatus,such as a hospital bed. However, the teachings of this disclosure areapplicable to all devices which receive power and which transmit and/orreceive data. Such devices may include computers of all types, homeappliances, industrial equipment, laboratory equipment, data acquisitionequipment, monitoring equipment, musical equipment, telecommunicationsdevices, audio equipment, and video equipment, just to name a few.Device 22 is sometimes referred to herein as “bed 22.” Communicationmodule 26 is coupled to a computer network with which bed 22communicates. Because plug 20 is configured to receive power and isconfigured to communicate wirelessly with module 26, only one connector(i.e., plug 20) is needed to provide both power and data to device 22and furthermore, only this single connector needs to be unplugged ifdevice 22 is to be moved to a new location.

In the embodiment of FIG. 1, a second communication module 74communicates with module 26 via a data cord 76. Module 74, in turn,communicates with a computer network via a data cord 78. In theillustrative example, the computer network includes an interface unit 80and a patient station 82 which are provided in the room adjacent to bed22. Unit 80 and station 82 are part of a Nurse Call system andcommunicate via a wired link 84, shown diagrammatically in FIG. 1. Unit80 and station 82 are coupled to other devices of the computer networkof the healthcare facility in a manner well known to those skilled inthe art. Additional details of unit 80 and station 82, as well asadditional details regarding how these portions of a Nurse Call systemconnect to other network devices in a healthcare facility are shown anddescribed in U.S. Pat. No. 6,362,725 which is owned by the same assigneeas the present application and which is hereby expressly incorporated byreference herein.

In the illustrative embodiment, data cord 78 includes a first 37-pinconnector 86 which connects to a 37-pin data port of module 74 and asecond 37-pin connector 88 which connects to a 37-pin data port of unit80 as shown in FIG. 1. The 37-pin data port of unit 80 is an existingdata port for connectivity to the computer network of the healthcarefacility. Although the data port of unit 80 in the illustrative examplereceives 37-pin connector 88, it is within the scope of this disclosureto configure module 74 and data cord 78 for connectivity to existingdata ports of any configuration having any number of pins or electricalcontacts. Module 74 includes a bed data port 90 to which may be coupleda separate data cable (not shown) extending from a bed that does nothave a plug, such as plug 20, which is capable of communicatingwirelessly with module 26. Such a separate data cable may be coupled tothe 37-pin data port of unit 80 instead of port 90, if desired.

The communications links between device 22 and plug 20, between plug 20and module 26, between module 26 and module 74 and between module 74 andthe network are governed by any suitable communications protocolincluding, but not limited to, protocols such as IrDA, spread spectrum(including the Bluetooth protocol), RS232, TCP/IP, USB, and 802.11_(X).Furthermore, any one or more of plug 20, device 22, module 26 and module74 may have circuitry for performing parallel-to-serial conversion,serial-to-parallel conversion, encoding, decoding, digital signalprocessing, compression and/or decompression (CODEC), or any other typeof data processing.

Plug 20 has a plug body 30 in which circuitry 24 is situated as shown inFIG. 3. In the illustrative example, circuitry 24 is situated in acavity provided in the top of plug body 30. However, it is within thescope of this disclosure for circuitry 24 to be situated anywhere inplug body 30, such as on one of the sides or on the bottom or on thefront of plug body 30. Plug 20 has a set of electrical contact membersincluding a first power prong 32, a second power prong 34, and a groundprong 36 as shown in FIG. 3. Prongs 32, 34, 36 extend from the front ofplug body 30 in parallel relation and are configured for receipt inassociated sockets 38 of outlet 28. Prongs 32, 34, 36 engage electricalcontacts (not shown) inside sockets 38 when plug 30 is physicallycoupled to outlet 28 as is well known in the art. In alternativeembodiments, ground prong is omitted from plug 30. In the illustrativeexample, plug 20 and outlet 28 are made in accordance with NationalElectrical Manufacturers Association (NEMA) standards relating todevices using 120 V, 60 Hz alternating current (AC) power. However, itis within the scope of this disclosure for plug 20 and outlet 28 to beconfigured in accordance with any desired standards, such as those usedin Europe or standards relating to devices using 220 V AC power, forexample.

Plug 20 is included as part of a cable assembly 39 which has a combinedpower-and-data cable or cord 40 that extends from the back of plug body30 as shown in FIGS. 1, 2A, and 3. The words “cable” and “cord” are usedinterchangeably in this disclosure. In the illustrative example, cable40 extends between the back of plug body 30 and the front of a junctionmember 42 of cable assembly 39 as shown in FIG. 2A. Cable assembly 39also has a data cord 44 and a separate power cord 46 that each extendfrom the back of junction member 42. Data cord 44 terminates at a dataconnector 48 and power cord 46 terminates at a power connector 50. Dataconnector 48 is configured to mate with an associated data connector(not shown) of device 22 and power connector 50 is configured to matewith an associated power connector (not shown) of device 22.

Cable 40 comprises a unitary jacket 52, a set of power conductors 54that are grouped together, and a set of data conductors 56 that aregrouped together as shown in FIG. 2B. Power conductors 54 each couple toa respective one of prongs 32, 34, 36. Thus, the power conductor 54associated with prong 36 is actually coupled to ground when plug 20 iscoupled to outlet 28. Data conductors 56 couple to circuitry 24. In theillustrative embodiment, each of conductors 54, 56 comprise metal wires.In alternative embodiments, data conductors 56 are fiber optic lines. Inthe illustrative embodiment, six of conductors 56 are used as follows: acarrier-in wire, a ground wire associated with the carrier-in wire, acarrier-out wire, a ground wire associated with the carrier-out wire, apower wire, and yet another ground wire. Thus, in the illustrativeembodiment, two of the eight conductors 56 are spare wires that are notused. In some embodiments, the six conductors 56 are grouped into threetwisted wire pairs with one of the twisted wires of the pair beingeither the carrier-in wire, the carrier-out wire, or the power and theother of the twisted wires of the pair being a ground wire.

Each of conductors 54, 56 is encased in its own insulator 58. A sheath60 surrounds data conductors 56 and serves to shield conductors 56, atleast partially, from any electromagnetic field(s) produced by therelatively high AC voltage levels associated with power conductors 54.In one embodiment, sheath 60 comprises aluminum and polyethylene,although sheath 60 may comprise any material or materials that are ableto shield conductors 56 to some degree. In the illustrative embodiment,a pleach 62 surrounds sheath 60 and a ground conductor 64 is embedded inpleach 62. In alternative embodiments, ground conductor 64 is groupedwith conductors 56 within the space surrounded by sheath 60 and, in suchembodiments, conductor 64 may have its own insulator similar toinsulators 58. In some embodiments, one or both of sheath 60 and pleach62 are omitted.

As is apparent in FIG. 2B, conductors 54, 56 are embedded in jacket 52and extend along the length of jacket 52. Conductors 54 and theassociated insulators 58 are routed through junction member from jacket52 to power cord 46. Conductors 56, the associated insulators 58, sheath60, pleach 62, and ground conductor 64 are routed through junctionmember 42 from jacket 52 to data cord 44. Thus, junction member 42serves as a splitter to split the combined power-and-data cord 40 intoseparate power and data cords 44, 46. In the illustrative embodiment,cords 40, 44, 46 of cable assembly 39 are not intended to be detachablefrom junction member 42. In alternative embodiments, connectors areprovided between one or more of cords 40, 44, 46 and junction member 42so that the one or more cords 40, 44, 46 to are detachable from junctionmember 42.

Having separate cords 44, 46 extending from junction member 42, withassociated connectors 48, 50 at the ends of cords 44, 46, allows cableassembly 39 to couple to devices having spaced-apart data and powerconnectors (not shown) which are configured to mate with connectors 48,50. Thus, devices 22 having completely separate power cords and datacords may be retrofitted with cable assembly 39. In alternativeembodiments, a combined power-and-data connector may be provided at theend of cable assembly 39 if the associated device has a mating connectorthat is appropriately configured to couple with the combinedpower-and-data connector of assembly 39. In such alternativeembodiments, junction member 42 is omitted and cable 40 extends betweenplug 20 and the combined power-and-data connector. In still otheralternative embodiments, device 22 is manufactured such that cable 40 isnot intended to be detachable from device 22 but rather extends into aportion of device 22, such as through a strain relief, for example, andthen conductors 56 couple to circuitry internal to device 22 by solderconnections or a data connector, for example.

As mentioned above, plug 20 has circuitry 24 that communicateswirelessly with communication module 26. Module 26, sometimes referredto herein as the “outlet module,” comprises a housing 66 and circuitry68 that is situated in a cavity provided in an upper portion 70 ofhousing 66 as shown in FIGS. 2A and 3. In the illustrative embodiment, abidirectional wireless communications link is established betweencircuitry 24 and circuitry 68 across a gap 72, shown in FIG. 4, thatexists between the top surface of plug body 30 and the bottom surface ofpart of upper portion 70. In alternative embodiments, a one-way wirelesscommunications link is established between circuitry 24 and circuitry68. The one-way wireless communications link may be from circuitry 24 tocircuitry 68 or vice versa.

In the illustrative example, gap 72 is relatively small, such as one theorder of 1 inch (2.54 cm) or less. However, gap 72 may be larger ifdesired. As long as gap 72 is small enough (i.e., on the order of 1 yardor 1 meter), then short-range transceivers may be used in plug 20 andmodule 26. If gap 72 is larger, then longer range transceivers are used.This disclosure contemplates that the wireless communications linkbetween circuitry 24 and circuitry 68, be it one-way or bidirectional,may be infrared (IR), radio frequency (RF), ultrasonic, or any othertype of wireless communications link. In the illustrative embodiment,data is transmitted wirelessly between circuitry 24 and circuitry 68 viafrequency modulated infrared (FMIR) signals as will be described infurther detail below.

Housing 66 of module 26 includes a bottom portion 92 and a pair of sideportions 94 that interconnect top portion 70 and bottom portion 92 asshown in FIGS. 2A and 3. Thus, a plug-receiving opening 96 is providedin housing 66 and is bounded by portions 70, 92, 94. Top portion 70protrudes outwardly beyond side portions 94 and is configured to receivea lens 112 adjacent an opening in a bottom wall 114 thereof. Wirelesssignals communicated between circuitry 24 and circuitry 68 pass throughlens 112. In addition, some or all of the top of plug body 30 is made ofa material that permits the wireless signals communicated betweencircuitry 24 and circuitry 68 to pass therethrough. A top wall 116 ofportion 70 of housing 66 has a notch 118 which receives data cable 76. Astrain relief 120 is coupled to data cable 76 and includes flangeportions 122 above and below top wall 116. Forces imparted on theportion of data cable 76 exposed outside of housing 66 are transmittedto top wall 116 of housing by strain relief 120, thereby protecting theintegrity of the connection between data wires of cable 76 and circuitry68.

One of side portions 94 of housing 66 is slightly larger than the otherof side portions 94 and has a cavity in which is received a Hall effectsensor 98. Wires 100 are routed from sensor 98 to circuitry 68 situatedin upper portion 70 of housing 70. A magnet 110, shown in FIG. 3 (inphantom) is coupled to plug body 30 and is sensed by sensor 98 when plug20 is plugged into outlet 28. In the illustrative embodiment, magnet 110is embedded in plug body 30 near one of the sides thereof. Inalternative embodiments, magnet 110 is situated elsewhere in plug body30 and sensor 98 is situated elsewhere in housing 66. In someembodiments, some or all of magnet 110 is situated outside of plug body.If sensor 98 signals circuitry 68 that magnet 110 is sensed, thencomputer devices coupled to the network, including module 74, aresignaled that device 22 is communicating with the network via plug 20having wireless communication capability.

A front wall 124 of portion 70 of housing 66 has a large aperture 126and a small aperture 128 as shown in FIG. 3. Circuitry 68 includes acircuit board 130 that carries a Nurse Call cancel button 132 and alight emitting diode (LED) 134. Button 132 is received by, or is atleast accessible through, aperture 126 and LED 134 is received by, or isat least viewable through, aperture 128 as shown in FIG. 4. If sensor 98senses the presence of magnet 110, thereby indicating that plug 20 isplugged into outlet 28, and then subsequently senses an absence ofmagnet 110, circuitry 68 will place a Nurse Call signal to the networkvia module 74 to indicate that plug 20 has been unplugged. Such a NurseCall signal serves as an alarm that plug 20 may have become unpluggedfrom outlet 28 inadvertently. If a caregiver has intentionally unpluggedplug 20 from outlet 28, then the caregiver can press button 132 tocancel the Nurse Call signal generated due to plug 20 being unplugged.

When sensor 98 senses the presence of magnet 110 and when circuitry 68of module 26 is able to communicate wirelessly with circuitry 24 of plug20, LED 134 shines green to indicate that plug 20 is plugged into outlet28 and to indicate successful wireless communication between plug 20 andmodule 26. If sensor 98 does not sense the presence of magnet 110 or ifcircuitry 68 is not able to communicate wirelessly with circuitry 24despite sensor 98 sensing the presence of magnet 110, then LED 134shines red to indicate an error condition in the communications linkbetween plug 20 and module 26. In alternative embodiments, module 26 mayhave multiple LED's in lieu of the single LED 134 which is able to shinered or green.

Depending upon whether outlet 28 is a simplex outlet (i.e., one outlet28) having a simplex cover plate 136, shown in FIG. 2A, or a duplexoutlet (i.e., two outlets 28) having a duplex cover plate 138, shown inFIG. 3, illustrative module 26 has either a simplex mounting plate 140or a duplex mounting plate 142, respectively. Plates 140, 142 mount overplates 136, 138, respectively. Plate 140 has a main portion 144 with aplug-receiving opening 146 that is generally centered between the topand bottom of portion 144 so as to align with outlet 28 in the simplexconfiguration as shown in FIG. 2A. Plate 142 has a main portion 148 witha plug-receiving opening 150 that is closer to the bottom of portion 148than the top of potion 148 so as to align with a bottom one of theoutlets 28 in the duplex configuration as shown in FIG. 3. Plates 140,142 each have a peripheral rim 152 extending rearwardly from portions144, 148, respectively. Rim 152 cooperates with the respective one ofportions 144, 148 to define a cavity that is sized to accommodate coverplates 136, 138, respectively, which project slightly away from the wallwith which outlets 28 are associated. Thus, illustrative rim 152surrounds the respective cover plate 136, 138 and engages the associatedwall.

Main portions 144, 148 of respective plates 140, 142 each have multiplegenerally round apertures 154 which are positioned to align withthreaded apertures associated with various configurations of outlets 28and which are configured to receive fasteners, such as screws, thereinto mount plates 140, 142 over plates 136, 138, respectively. Thus,fasteners are received in different ones of apertures 154 depending uponthe configuration of a particular outlet with which plates 140, 142 areused. A ridge 156 extends forwardly from each of portions 144, 148 andis inset by a slight amount from the outer periphery of portions 144,148. A pair of generally rectangular apertures 158 are provided in topportions of ridge 156. In the illustrative example, a pair of gaps 160are provided between portions of ridges 156 of plates 140, 142. The gap160 between the top portions of ridges 156 is provided to accommodateone of apertures 154 and to permit data cable 76 to pass therethrough.The other of gaps 160 is provided between portions of ridges 156 nearone of the sides of respective plates 140, 142 to receive a tool, suchas a screwdriver, if needed, to facilitate disassembly of module 26 and,in the case of plate 140 to accommodate one of apertures 154.

Housing 66 is configured to couple to each of plates 140, 142. Thus,although plates 140, 142 are configured differently depending uponwhether outlet 28 has a simplex or duplex configuration, the sameconfiguration of housing 66 may be used regardless of whether outlets 28have a simplex or duplex configuration. In the illustrative embodiment,a pair of fingers or tabs 162 extend downwardly from top wall 116 ofhousing 66 as shown in FIG. 3 (in phantom). Tabs 162 are received inapertures 158 of ridges 156 of plates 140, 142 when housing 66 ismounted to either of plates 140, 142. Each of plates 142 has a threadedboss 164 and bottom portion 92 of housing 66 has a round aperture 166. Afastener, such as a screw, extends through aperture 166 and threads intoboss 164 to retain housing 66 on the associated one of plates 140, 142.

While mounting plates 140, 142 have been discussed above as mounting tooutlets 28 and associated plates 136, 138 with fasteners, such asscrews, and while housing 66 has been described above as mounting toplates 140, 142 with tabs 162 and fasteners, such as screws, it iswithin the scope of this disclosure for alternative coupling mechanismsto couple portions of module 26 together or to mount module 26 adjacentto outlet 28. For example, clips, rivets, snaps, fingers, tabs,adhesive, tape, bands, straps, magnets, and the like, as well ascombinations of these, are contemplated by this disclosure for couplingportions of module 26 together and for mounting module 26 adjacent tooutlet 28. While the illustrative embodiment has module 26 mounted overplates 136, 138 associated with outlets 28, in alternative embodiments,module 26 is mounted to the wall (or any other structure to which outlet28 is mounted or any other suitable structure in the vicinity of outlet28) either above, below, or beside cover plates 136, 138 associated withoutlets 28. In still other embodiments, cover plates 136, 138 areomitted and module 26, itself, serves as a cover plate for theassociated outlet 28.

Opening 96 of housing 66 is large enough to permit opening 146 of plate140 and opening 150 of plate 142 to align generally with differentportions of opening 96. When plug 20 is coupled to outlet 28, a portionof plug 20 is received in opening 96 and in whichever one of openings146, 150 is in registry with opening 96. Furthermore, the outerperipheries of housing 66 and each of plates 140, 142 have generally thesame dimensions so that when housing 66 is coupled to either of plates140, 142, the top surface of upper portion 70 of housing is generallycoplanar with the upper surface of rim 152, the outer side surfaces ofside portions 94 are generally coplanar with the side surfaces of rim152, and the bottom surface of bottom portion 92 is generally coplanarwith the bottom surface of rim 152.

In the illustrative embodiment of FIGS. 1-4, the peripheries of housing66 and plates 140, 142 are generally rectangular, but with roundedcorners, and are just slightly larger than the outer periphery of coverplates 136, 140. In addition, module 26 protrudes from the wallassociated with outlet 28 by an amount that is roughly about half thelength of plug body 30, but having portion 70 overhanging a portion ofplug body 30 of plug 20 to permit wireless communication betweencircuitry 24 carried by plug body 30 and circuitry 68 situated in theupper portion 70 of housing 66. Thus, in the illustrative embodiment ofFIGS. 1-4, module 26 is fairly compact in size. Due to the compact sizeof module 26, some data processing circuitry is situated in module 74 asdescribed in further detail below. It is within the scope of thisdisclosure, however, for module 26 to have any desired shape.

As mentioned above, communication module 74, which is sometimes referredto herein as the “wall module,” communicates with module 26 via datacord 76. Module 74 includes a housing 168, a face plate 170 that couplesto housing 168, and circuitry 172 that couples to face plate 170 asshown in FIG. 2A. Housing 168 is configured to mount to a standardelectrical junction box 174. Illustratively, housing 168 includes a boxportion 176 that is received inside junction box 174 and a flange 178that extends outwardly from an open front of box portion 176.

Flange 178 has four apertures 180 that generally align with threadedapertures 182 provided in front rails 184 of junction box 174. Faceplate 170 has four fastener-receiving bosses 171 that generally alignwith apertures 180 and apertures 182. Fasteners, such as screws, extendthrough bosses 171 and through apertures 180 and are threaded intoapertures 182 to couple housing 168 and face plate 170 to junction box174. In lieu of fasteners received by bosses 171 and apertures 180, 182,all types of coupling mechanisms, including, for example, clips, rivets,snaps, fingers, tabs, adhesive, tape, bands, straps, magnets, and thelike, as well as combinations of these, are contemplated by thisdisclosure for coupling housing 168 and face plate 170 to box 174.

Circuitry 172 of module 74 comprises a pair of circuit boards 186 in aback-to-back arrangement and separated by spacers 188 as shown in FIG.2A. A set of threaded bosses 190 extend from face plate 170, each boss190 being generally aligned with a corresponding spacer 188. A set offasteners, illustratively screws 192, extend through spacers 188 andthrough associated apertures provided in circuit boards 186 and threadinto bosses 190 to couple circuitry 172 to face plate 170. Face plate170 includes a pair of elongated openings 194, one of which alignsgenerally with bed data port 90 and the other of which aligns generallywith the data port to which 37-pin connector couples.

As shown diagrammatically in FIG. 5, bed 22 has a bed control module 196coupled to a power/data input/output (I/O) module 198. Module 196comprises circuitry that controls the operation of various functions ofbed 22. In addition, module 196 sends and receives control data asindicated at block 210 and is coupled to a bed speaker 212. Examples ofthe bed functions controlled by module 196 include raising and loweringan upper frame of the bed relative to a base frame of the bed, tiltingthe upper frame of the bed relative to the base frame, raising andlowering a head section of a mattress-support deck of the bed, raisingand lowering a foot section and/or a thigh section of themattress-support deck of the bed, operating a weigh system of the bed,operating a patient position monitoring (PPM) system of the bed,inflating and deflating air bladders included in the mattress of thebed, and adjusting the volume of speaker 212. Those skilled in the artwill appreciate that bed 22 may have other functions which arecontrolled by module 196 and all of such functions may be controlled bycircuitry included in module 196 in accordance with this disclosure.

Examples of control data associated with block 210 include casterbraking data (i.e., set or not set), siderail position data (i.e., up ordown), bed function lock out data (i.e., whether a caregiver has lockedout certain functions of the bed), room light data (i.e., whether one ormore lights in a room should be turned on or off), television (TV)control data (i.e., whether a TV should be on or off, whether a TVchannel should be changed up or down, whether TV volume should bechanged up or down), radio control data (i.e., whether a radio should beon or off, whether a radio channel should be changed up or down, whetherradio volume should be changed up or down), Nurse call data (i.e.,whether a Nurse call signal has been generated, whether a Nurse callcancel signal has been generated), and microphone control data (i.e.,whether a microphone of the bed is on or off). Those skilled in the artwill appreciate that bed 22 may have other control data associatedtherewith and that all of such control data may be communicated to orfrom module 196 in accordance with this disclosure.

Module 198 is coupled to a power cord module which, in one embodiment,corresponds to cable assembly 39 described above. Therefore, the samereference number (i.e., 39) is used to denote power cord module in FIG.5 as is used to denote cable assembly 39 in FIGS. 1-4. Module 39communicates with module 26 via a bidirectional digital data optic linkas indicated in FIG. 5. Module 198 comprises circuitry that conditionsand converts AC power received from module 39 into direct current (DC)voltage levels, such as ±5 V, ±12 V, ±24 V, etc. for use by circuitcomponents, such as integrated circuit chips, drive motors, relays, andthe like, which are included in bed 22. Thus, module 198 comprisescircuit components such as transformers, rectifiers, voltage dividers,and voltage regulators, which are typically associated with powercircuitry. In addition, one or more of modules 39, 196, 198 alsoincludes signal-processing circuitry. Such signal-processing circuitrymay include, for example, circuitry for performing parallel-to-serialconversion, serial-to-parallel conversion, encoding, decoding, digitalsignal processing, compression and/or decompression (CODEC), or anyother type of signal processing. However, the term “signal-processingcircuitry” as used in this disclosure, including the claims, is intendedto mean broadly circuitry of any and all types that modify, transform,or change a signal.

As also indicated diagrammatically in FIG. 5, the room in which bed 22is situated has associated therewith room centric services such as TV,entertainment, and patient communication as indicated at block 214.These room centric services, as well as additional services known tothose skilled in the art, such as room temperature control and roomlighting control, are controlled by signals that originate as controldata 210 from user input devices of bed 22. The signals having controldata 210 are processed by one or more of modules 39, 196, 198 prior tobeing communicated wirelessly from module 39 to module 26. The signalshaving control data 210 are communicated from module 26 to module 74,are processed by one or more of modules 26, 74, and then arecommunicated either directly from module 74 to the service to becontrolled or to the network of the healthcare facility for subsequentcommunication to the service to be controlled.

Emergency power 216 is coupled to outlet 28 as shown diagrammatically inFIG. 5 and power from outlet 28 is provided to wall module 74 via anelectrical coupling 218. It should be understood that the electricalcoupling 218 shown diagrammatically in FIG. 5 is intended to indicatethat outlet 28 and module 74 receive power from a common power sourcethat delivers power to the room and is not intended to indicatenecessarily that module 74 plugs into any of the sockets 38 of outlet28, although such an embodiment is within scope of this disclosure. Insome embodiments, cable 76 includes conductors that deliver power tomodule 26 from module 74.

According to the embodiment illustrated in FIG. 5, data cable 78 extendsfrom module 78 and couples directly to patient station 82. Thus, in theembodiment of FIG. 5, interface unit 80 is omitted from thecommunications link between module 74 and station 82. An optional wiredand/or wireless communication module 200 may be included in bed 22and/or in the room in which bed 22 is situated as shown in FIG. 5. Inthe illustrative example, a network 218 of the healthcare facilityincludes a wireless ethernet bridge 220 which communicates wirelesslywith each of modules 200 if modules 200 are of the type that communicatewirelessly as indicated by phantom lines 222 in FIG. 5. Alternatively,modules 200 may couple to network 218 by wired communications links asindicated by lines 224 in FIG. 5. As further shown in FIG. 5, aplurality of network appliances 226 are coupled to network 218.Appliances 226 may include other beds, other computer devices, othercommunication modules (like modules 26, 39, 74, 196, 198, 200), roomcentric services (like those associated with block 214), and any otherequipment configured to couple to network 218.

Referring now to FIGS. 6A-6C, which is a block diagram showing moredetail about the circuitry of one embodiment of device 22 and cableassembly 39, circuitry 24 includes an IR transceiver 228. Transceiver228 comprises photodiodes 230, at least one of which is a photoemitterand at least one of which is a photodetector. The photodiodes 230 oftransceiver 228 are coupled to a circuit board of circuitry 24 situatedin plug body 30. The at least one photodiode 230 which operates as thephotoemitter of transceiver 228 emits a first FMIR signal and the atleast one photodiode 230 which operates as the photodetector oftransceiver 228 receives a second FMIR signal. Transceiver 228 iscoupled to a receiver amplifier/transmitter passthrough circuit 232,shown in FIG. 6A, which is included as part of circuitry 24 in plug body230 in some embodiments. Circuit 232 is coupled to a signal conditioner234. The signals being transmitted and received by transceiver 228 passthrough conditioner 234 and circuit 232 for amplification and/orconditioning in any desired manner.

A configuration jumper 236 is coupled to conditioner 234 as shown inFIG. 6A. Jumper 236 receives a mixed audio-and-data out signal 237 froma summing amplifier 238, which audio-and-data out signal 237 istransmitted from transceiver 228 after being conditioned by conditioner234 and after passing through circuit 232. In addition, a mixedaudio-and-data in signal 235 is communicated to a wide band pass filter240 from jumper 236, which audio-and-data in signal 235 was received bytransceiver 228, amplified by circuit 232, and conditioned byconditioner 234 prior to receipt by jumper 236. Thus, the FMIR signalstransmitted and received by the photodiodes 330 of transmitter 228 aremixed signals that contain both audio and data portions.

A filtered audio-and-data in signal 239 is output from filter 240 and isinput into a low noise amplifier 242. An amplified and filteredaudio-and-data in signal 243 is output from amplifier 242 and is inputinto a limiter and IR demodulator circuit 244. Circuit 244 demodulatessignal 243 received from amplifier 242 at two different frequencies, oneof which corresponds to the carrier frequency associated with the audioportion of mixed audio-and-data 235 in signal and the other of whichcorresponds to the carrier frequency associated with the data portion ofmixed audio-and-data in signal 235. Thus, circuit 244 outputs a datasignal 246 and an audio signal 248, which signals 246, 248 are inputinto squelch circuitry 250.

A squelched data signal 249 and a squelched audio signal 251 are outputfrom circuitry 250 as shown in FIG. 6A. Squelched data signal 249 is acoded pulse signal that is input into a data slicer 252, shown in FIG.6B. Data slicer 252 decodes signal 249 and outputs a digital data signal253 which comprises Universal Asynchronous Receiver Transmitter (UART)packets of data communicated to a microcontroller 254 of device 22.Squelched audio signal 251 is input into an audio amplifier 256 and anamplified audio signal 257 is output from amplifier 256 as shown in FIG.6B. Signal 257 is input into an audio transformer 258 which outputs anaudio signal 259 that is input into a latching device 260. Latchingdevice 260 is controlled by a relay control signal 261 output frommicrocontroller 254. Signal 261 controls whether latching device 260,which comprises one or more relays in some embodiments, is in a firstposition in which audio signal 259 is coupled to a speaker 262 of device22 or a second position in which a headwall speaker audio signal 263received by a 37-pin connector or port 264, shown in FIG. 6C, is coupledto speaker 262. If microcontroller 254 is signaled that sensor 98 ofmodule 26 senses the presence of magnet 110 of plug 20, thenmicrocontroller 254 configures signal 261 to move latching device 260 tothe first position.

The audio portion of the FMIR signal which is received by transceiver228 and which is sounded through speaker 262 after being processed inthe manner discussed above includes, for example, voice data (human orprerecorded) originating at a master nurse call station, voice dataoriginating at another station similar to station 82 but located inanother patient room, television sound, radio sound, and/or an audiblealarm signal. The data portion of the FMIR signal which is received bytransceiver 228 and which is communicated to microcontroller 254 afterbeing processed in the manner discussed above may be any of a number ofdifferent data signals, such as alarm signals, signals for controllingfunctions of device 22, interrogation signals to request thatmicrocontroller 254 respond with certain data, and signals forcontrolling additional devices that are coupled to microcontroller 254via at least one product specific interface 266, shown in FIG. 6C.Examples of devices that may couple to the at least one product specificinterface 266 include, for example, patient monitoring devices (e.g.,EKG's, EEG's, blood pressure monitors, pulse oximetry equipment,respiration monitors), patient care equipment (e.g., intravenous fluidinfusion devices, drug infusion devices, ventilators), and bed controldevices, such as hand held pendants. In the illustrative example, anurse call switch 268 is coupled to interface 266.

As shown diagrammatically in FIG. 6B, microcontroller 254 includesmemory 270, a pair of general purpose input/output interfaces 272, aserial interface 274, a serial peripheral interface (SPI) 276, acontrolled architecture network (CAN) interface 278, and software 280which is executed by a central processing unit (CPU) (not shown) of themicrocontroller 254. The various interfaces 272, 274, 276, 278 couple todevices and circuitry included in bed 22 as is known by those skilled inthe art. An example of a known bed having a CAN system is the VersaCare™bed available from Hill-Rom Company, Inc.

Microcontroller 254 controls a latching device 282, shown in FIG. 6B,via a relay control signal 283. Signal 283 controls whether latchingdevice 282 is in a first position or in a second position. If device 282is in the first position, a bed power circuit 284, shown in FIG. 6A,delivers cord power (AC) 285 from cable assembly 39 to a module powersupply circuit 286 which, in turn, delivers power after any needed powerconversion or regulation to the various components of bed 22 thatrequire power to operate. If device 282 is in the second position,circuit 284 delivers backup battery power to circuit 286 which, in turn,delivers power to at least some of the various components of bed 22 thatrequire power to operate.

Microcontroller 254 is coupled to a nurse call circuit 288, a universaltelevision application specific integrated circuit (UTV ASIC) 290, and aset of general purpose relays 292, shown in FIG. 6C, by first controllines 289, second control lines 291, and third control lines 293,respectively. The signals that microcontroller 254 sends to circuit 288,UTV ASIC 290, and relays 292 to control these portions of device 22 aredetermined by signals received via one or more of interfaces 272, 274,276, 278 from user input devices, such as buttons on a control panel ofdevice 22 or on a hand-held control unit of device 22, that aremanipulated by a user, such as a patient or caregiver of bed 22. Circuit288, UTV ASIC 290, and Relays 292 provide relay outputs 294, UTV serialdata 295, and relay outputs 296, respectively, to connector 264 as shownin FIG. 6C. In some embodiments, nurse call circuit 288 comprises arelay that closes in response to a patient placing a nurse call withswitch 268.

UTV ASIC 290 comprises circuitry that controls the operation of atelevision in the patient room and, in some embodiments, UTV ASIC 290 isconfigured to output the appropriate data signals to control multiplebrands of televisions. In some embodiments, general purpose relays 292are coupled to motors, such as motors of linear actuators, that areoperated to move various portions of bed 22. Such movements of bed 22may include raising or lowering a head section of bed 22, raising orlowering a thigh or foot section of bed 22, raising or lowering an upperframe of bed 22 relative to a base frame of bed 22, and tilting theupper frame of bed 22 relative to the base frame of bed 22.

A set of LED's 298 are coupled to connector 264 by LED signal lines 297and to microcontroller 254 by control lines 299. Each of the LED'scorrespond to various ones of the functions of bed 22 that arecontrolled by or monitored by microcontroller 254 and are turned on oroff (or are operated to shine one color or another color) to indicate astatus of the associated function. A current loop gateway circuit 300sends and/or receives SPI1 signals 302 to and/or from microcontroller254. Circuit 300 also sends and/or receives SPI current loop signals 304to and/or from connector 264 as shown in FIGS. 6B and 6C. In addition,an entertainment audio circuit 306 and a set of volume control relays308 are coupled to each other and to connector 264 by analog audio lines307. In some embodiments, circuit 306 and relays 308 are coupled tomicrocontroller 254 to be controlled and/or monitored by microcontroller254. Optionally, a separate nurse call switch 310 may be coupled to aphone jack 312 which, in turn, is coupled to connector 264 by a nursecall line 313. In some embodiments, microcontroller 254 monitors thestatus of switch 310 to determine whether switch 310 has been used toplace a nurse call.

Connector 264 is provided on bed 22 so that, in the event that a wiredconnection from bed 22 to the network of the healthcare facility isdesired, such a wired connection may be accomplished, for example, bycoupling connector 264 to interface unit 80, shown in FIG. 1, with anappropriately configured cable assembly having 37-pin connectors at eachend. However, according to this disclosure, such a wired connection isnot necessary because any data and audio that would otherwise be sent toor received from the network by bed 22 via connector 264, iscommunicated wirelessly to and/or from transceiver 228. Thus, any datato be sent from bed 22 is output from microcontroller 254 as a digitaldata signal 314, such as a serial data signal.

Data signal 314 comprises UART packets of data from microcontroller 254that are input into a biphase encoder 316, shown in FIG. 6A, whichconverts the digital data of signal 314 into a coded pulse signal 318.For example, in one embodiment, a logic level “0” bit frommicrocontroller 254 is coded as a single 200 microsecond pulse and alogic level “1” bit from microcontroller 254 is coded as two 100microseconds pulses. A first amount of spacing is provided between thetwo 100 microsecond pulses and a transition code is transmitted betweenthe bits of data. Signal 318 is input into a Data FM/IR Modulator 356which modulates signal 318 at a predetermined carrier frequency toproduce a modulated data signal 357 which is input into summingamplifier 238.

Any audio signals from bed 22, such as, for example, an audio signal 319originating from a microphone 320 which is provided on bed 22 and whichis coupled to a daughter board interface 321, is input in an FM/IRmodulator 322. In alternative embodiments, speaker 262 may also serve asa microphone and may output an audio signal that is input into modulator322. A modulated audio signal 323 is output from modulator and is inputinto summing amplifier 238, which mixes signals 318, 323 to produce themixed audio-and-data out signal 237 which is transmitted fromtransceiver 228 after being conditioned by conditioner 234 and passedthrough circuit 232.

In alternative embodiments, a second audio-and-data out signal 324 mayoriginate on a circuit board (not shown) that is coupled to a daughterboard interface 326. Such a circuit board may receive and/or transmit anSPI2 signal 325 to and/or from microcontroller 254 as shown in FIGS. 6Aand 6B. Such a circuit board may also receive power from circuit 286.Signal 324 is coupled to jumper 236 and is transmitted by transceiver228 along with signal 237 or in lieu of signal 237 after signal 324 isconditioned by conditioner 234 and passed through circuit 232.

Referring now to FIGS. 7A-7C, which is a block diagram showing moredetail about the circuitry 68 of one embodiment of outlet module 26 andthe circuitry 172 of one embodiment of wall module 74, circuitry 68includes an IR transceiver 328. Transceiver 328 communicates wirelesslywith transceiver 228 and comprises photodiodes 330, at least one ofwhich is a photoemitter and at least one of which is a photodetector.Referring briefly to FIG. 3, the photodiodes of transceiver 328 arecontained in a housing 329 which is mounted to circuit board 130 andwhich is positioned to aim the photodiodes of circuitry 68 through lens112 toward the photodiodes of circuitry 24 of plug 20. Thus, thephotodiodes 230, 330 of transceivers 228, 328 send and receive wirelesssignals in a direction that is substantially perpendicular to thedirection that prongs 32, 34, 36 extend from plug body 30. Referringonce again to FIG. 7A, nurse call cancel button 132 is showndiagrammatically as a switch and LED 134 is shown diagrammatically astwo separate LED's.

As will become apparent in the discussion below, the circuitry 172 ofmodule 74 is very nearly the same as the circuitry of bed 22 discussedabove in connection with FIGS. 6A-6C. Thus, in the illustrativeembodiment, module 74 operates as a bed emulator. As such, the networkof the healthcare facility receives signals from and provides signals tomodule 74 just as if the network were connected directly to thecircuitry of bed 22 via connector 264.

The at least one photodiode 330 which operates as the photoemitter oftransceiver 328 emits a third FMIR signal and the at least onephotodiode 330 which operates as the photodetector of transceiver 328receives a fourth FMIR signal (the first and second FMIR signals werediscussed above in connection with photodiodes 230 of transceiver 228).Transceiver 328 is coupled to a receiver amplifier/transmitterpassthrough circuit 332, shown in FIG. 7A, which is included as part ofcircuitry 68 in module 26. Circuit 332 is coupled to a signalconditioner 334 of circuitry 172 by data cable 76. The signals beingtransmitted and received by transceiver 328 pass through conditioner 334and circuit 332 for amplification and/or conditioning in any desiredmanner.

A configuration jumper 336 is coupled to conditioner 334 as shown inFIG. 7A. Jumper 336 receives a mixed audio-and-data out signal 337 froma summing amplifier 338, which audio-and-data out signal 337 istransmitted from transceiver 328 to transceiver 228 after beingconditioned by conditioner 334 and after passing through circuit 332. Inaddition, a mixed audio-and-data in signal 335 is communicated to a wideband pass filter 340 from jumper 336, which audio-and-data in signal 335was received by transceiver 328 from transceiver 228, amplified bycircuit 332, and conditioned by conditioner 334 prior to receipt byjumper 336. Thus, the FMIR signals transmitted and received by thephotodiodes of transmitter 328 are mixed signals that contain both audioand data portions.

A filtered audio-and-data in signal 339 is output from filter 340 and isinput into a low noise amplifier 342. An amplified and filteredaudio-and-data in signal 343 is output from amplifier 342, as shown inFIG. 7A, and is input into a limiter and IR demodulator circuit 344 asshown in FIG. 7B. Circuit 344 demodulates signal 343 received fromamplifier 342 at two different frequencies, one of which corresponds tothe carrier frequency associated with the audio portion of mixedaudio-and-data in signal 335 and the other of which corresponds to thecarrier frequency associated with the data portion of mixedaudio-and-data in signal 335. Thus, circuit 344 outputs a data signal346 and an audio signal 348, which signals 346, 348 are input intosquelch circuitry 350.

A squelched bed data signal 349 and a squelched audio signal 351 areoutput from circuitry 350 as shown in FIG. 7B. Squelched bed data signal349 is a coded pulse signal that is input into a data slicer 352. Dataslicer 352 decodes signal 349 and outputs a digital bed data signal 353which comprises UART packets of data communicated to a microcontroller354 of circuitry 172 of module 74. Squelched audio signal 351 is coupledto a daughter board interface 355 so that optional circuitry (not shown)coupled to interface 355 receives audio signal 351 for subsequentprocessing. In alternative embodiments, audio signal 351 is input intoan audio amplifier (not shown) which amplifies audio signal 351 andoutputs the amplified audio signal to a 37-pin connector 364 shown inFIG. 7C for subsequent connection to the network of the healthcarefacility.

The audio portion of the FMIR signal which is received by transceiver328 and which eventually becomes audio signal 351 after being processedas described above may be, for example, voice data originating atmicrophone 320, shown in FIG. 6A. The data portion of the FMIR signalwhich is received by transceiver 328 and which is communicated tomicrocontroller 354 after being processed in the manner discussed abovemay be any of a number of different data signals, such as alarm signals,signals relating to the status of functions of device 22, interrogationsignals to request that microcontroller 354 respond with certain data,and signals relating to the status of any additional devices that arecoupled to microcontroller 254 via interface 266 as discussed above inconnection with FIGS. 6B and 6C.

As shown diagrammatically in FIG. 7B, microcontroller 354 includesmemory 370, a pair of general purpose input/output interfaces 372, aserial interface 374, a serial peripheral interface (SPI) 376, acontrolled architecture network (CAN) interface 378, and software 380which is executed by a central processing unit (CPU) (not shown) of themicrocontroller 354. The various interfaces 372, 374, 376, 378 couple tocircuitry provided in module 74 to emulate any devices or circuitry ofbed 22 that are coupled to interfaces 272, 274, 276, 278 ofmicrocontroller 254. A wall power circuit 384, shown in FIG. 7A,delivers power via one or more power lines 365 to a module power supplycircuit 386 which, in turn, delivers power after any needed powerconversion or regulation to the various components of module 74 thatrequire power to operate.

Microcontroller 354 is coupled to a nurse call circuit 388, a latchingnurse call circuit 381, a universal television application specificintegrated circuit (UTV ASIC) 390, and a set of general purpose relays392, shown in FIG. 7C, by first control lines 389, second control lines279, third control lines 391 and fourth control lines 393, respectively.The signals that microcontroller 354 sends to circuits 381, 388, UTVASIC 290, and relays 390 to control these portions of module 74 aredetermined by signals received wirelessly by transceiver 330. Circuits381, 388, UTV ASIC 390, and Relays 390 provide relay outputs 394, UTVserial data 395, and relay outputs 396, respectively, to connector 364as shown in FIG. 7C. UTV ASIC 390 comprises circuitry that controls theoperation of a television in the patient room and, in some embodiments,UTV ASIC 390 is configured to output the appropriate data signals tocontrol multiple brands of televisions. It will be appreciated that therelays 392 are controlled to mimic or emulate the positions (i.e.,opened or closed) of general purpose relays 292 which, in someembodiments, are coupled to motors that are operated to move variousportions of bed 22, as described above. However, in the illustrativeembodiment, relays 392 are not actually coupled to any motors but simplyprovide signals to connector 364 to indicate to the network the statusof the counterpart relays 292.

A set of LED's 398 are coupled to connector 364 by LED signal lines 397and to microcontroller 354 by control lines 399. Each of the LED's 398correspond to various ones of the LED's 298 that, in turn, correspond tofunctions of bed 22. A current loop gateway circuit 400 sends and/orreceives SPI1 signals 402 to and/or from microcontroller 354. Circuit400 also sends and/or receives SPI current loop signals 404 to and/orfrom connector 364 as shown in FIGS. 7B and 7C. In addition, anentertainment audio circuit 406 and a set of volume control relays 408are coupled to each other and to connector 364 by analog audio lines407. In some embodiments, circuit 406 and relays 408 are coupled tomicrocontroller 354 to be controlled and/or monitored by microcontroller354.

Connector 90 is wired to connector 364 by lines 411 and is coupled tomicrocontroller 356 by a wired bed interface line 415. Thus, if a wiredconnection is provided between bed 22 and connector 90 with anappropriately configured cable assembly having 37-pin connectors at eachend, then signals associated with the various pins of connector 90 areprovided to corresponding ones of the pins of connector 364 by lines 411for communication with, monitoring of, and/or control of the variouscomponents of circuitry 172 that are coupled to connector 364. Signalson line 415 indicate to microcontroller 354 whether or not bed 22 iswired to connector 90.

Data regarding the status of button 132 and LED 134 are communicatedfrom jumper 336 to microcontroller 354 by switch/LED data lines 417 asshown in FIGS. 7A and 7B. Any data to be sent from microcontroller 354to bed 22 is output by microcontroller 354 as a digital data signal 414that is input into a biphase encoder 416, shown in FIG. 7A. Data signal414 comprises UART packets of data from microcontroller 354 that areconverted by biphase encoder 316 into a coded pulse signal 418. In oneembodiment, the pulses of signal 418 are coded in the same manner thatthe pulses of signal 318 are coded as described above. Signal 418 isinput into a Data FM/IR Modulator 456 which modulates signal 418 at apredetermined carrier frequency to produce a modulated data signal 457which is input into summing amplifier 338.

Any audio signals received by connector 364 from the network, such as,for example, a headwall speaker audio signal 419 is input into an audiotransformer 420. Transformer 420 outputs a transformed audio signal 427that is input into an FM/IR modulator 422. A modulated audio signal 423is output from modulator 422 and is input into summing amplifier 338,which mixes signals 418, 423 to produce the mixed audio-and-data outsignal 337 which is transmitted from transceiver 328 after beingconditioned by conditioner 334 and passed through circuit 332.

In alternative embodiments, a second audio-and-data out signal 424 mayoriginate on a circuit board (not shown) that is coupled to a daughterboard interface 426. Such a circuit board may receive and/or transmit anSPI2 signal 425 to and/or from microcontroller 354 as shown in FIGS. 7Aand 7B. Such a circuit board may also receive power from circuit 386.Signal 424 is coupled to jumper 336 and is transmitted by transceiver328 along with signal 337, or in lieu of signal 337, after signal 424 isconditioned by conditioner 334 and passed through circuit 332.

As is apparent from the above discussion, the bidirectional wirelesscommunication between plug 20 and module 26 is established by a firstmixed FMIR signal that is transmitted from transceiver 228 of plug 20 totransceiver 328 of module 26 across gap 72 and by a second mixed FMIRsignal that is transmitted from transceiver 328 of module 26 totransceiver 228 of plug 20 across gap 72. The first mixed FMIR signalincludes an audio portion modulated at a first carrier frequency and adata portion modulated at a second carrier frequency. The second mixedFMIR signal includes an audio portion modulated at a third carrierfrequency and a data portion modulated at a fourth carrier frequency.While the four different carrier frequencies may be any desiredfrequencies, in one embodiment, the first carrier frequency is 2.3Megahertz (MHz), the second carrier frequency is 4.0 MHz, the thirdcarrier frequency is 2.8 MHz, and the fourth carrier frequency is 5.0MHz.

The audio portions of the FMIR signals transmitted between transceivers228, 328 remain analog throughout the transmission and processing. Theseaudio signals are frequency modulated similar to the manner in which FMradio signals are frequency modulated. However, instead of beingtransmitted by an RF antenna, the audio signals are transmitted byphotodiodes 230, 330 which, in some embodiments, are high speed IRLED's. The demodulators 244, 344 are tuned to the appropriate carrierfrequencies of the audio portions of the FMIR signals. The data portionsof the FMIR signals are frequency modulated in basically the same manneras the audio signals, but the data being modulated is a coded pulsesignal that, in one embodiment, has a bandwidth of about 10 kilohertz(kHz).

In the illustrative embodiment, a model no. TSH511 and a model no.TSH512 chipset available from STMicroelectronics of Geneva, Switzerlandis used in the circuitry of device 22 and in the circuitry 172 of module74. As indicated by the dotted line box in FIG. 6A, the TSH511/TSH512chipset of bed 22 comprises summing amplifier 238, wide band pass filter240, low noise amplifier 242, limiter and IR demodulator 244, squelchcircuitry 250, audio FM/IR modulator 322, and data FM/IR modulator 356.Similarly, as indicated by the dotted line box in FIGS. 7A and 7B, theTSH511/TSH512 chipset of module 74 includes summing amplifier 338, wideband pass filter 340, low noise amplifier 342, limiter and IRdemodulator 344, squelch circuitry 350, audio FM/IR modulator 422, anddata FM/IR modulator 456.

Electric circuit schematics of one implementation of the above-describedsystem in accordance with this disclosure are provided in U.S.Provisional Patent Application Ser. No. 60/601,501 which was filed Aug.13, 2004 and which is already incorporated by reference herein.

Referring now to FIGS. 8-10, an alternative embodiment of a combinedpower-and-data cord assembly 439 has a power-and-data cord 440terminating at a power-and-data plug 450 that is plugged into a firstoutlet 428 of a wall duplex outlet. An alternative embodiment of acommunication module 430 is plugged into a second outlet 429 of the wallduplex outlet and is configured to communicate wirelessly with circuitrycarried by plug 450. The circuitry carried by plug 450 is substantiallysimilar to circuitry 24 of plug 20 described above. Communication module430 is sometimes referred to herein as the “outlet module.” A data cable476 extends from outlet module 430 to a patient station 482 of a nursecall system of a network of the healthcare facility.

Module 430 has a housing 432 that carries circuitry corresponding tocircuitry 68 of module 26, described above, and corresponding tocircuitry 172 of module 74, described above. Thus, module 430 isbasically a combination of modules 26, 74 into a single communicationmodule. Module 430 has a nurse call cancel button 434, shown in FIGS. 9and 10, which operates similarly to button 132 of module 26. Inaddition, module 430 has an LED 436 which operates similarly to LED 134of module 26.

Because plug 450 couples to outlet 428 above module 430, the circuitrycarried by plug 450 is situated in a lower portion of a plug body 452.The circuitry of plug 450 includes a wireless transceiver thatcommunicates wirelessly with a wireless transceiver of module 430 acrossa gap 472 defined between plug body 452 and module 430 as shown in FIG.10. Module 430 has a window or lens 454, shown in FIG. 8, that islocated at a top portion of housing 432 and that is transmissive to thewireless signals communicated between module 430 and plug 450.

Plug 450 has three electrical contact members 442, two of which areshown in FIG. 10 (in phantom), that receive power and ground fromelectrical contacts of outlet 428. Module 430 has three members 444, twoof which are shown in FIG. 10 (in phantom) that plug into outlet 429. Insome embodiments, members 444 are conductive and receive power andground from electrical contacts of outlet 429. In other embodiments,members 444 are nonconductive and simply provide a means by which module430 is mounted to outlet 429 beneath plug 450.

Data cable 476 has a first connector 446 at one end and a secondconnector 448 at an opposite end. Connector 446 couples to a matingconnector accessible through a port located at the bottom of module 430as shown in FIGS. 8-10. Connector 448 couples to a mating connectoraccessible through a port located on the front of station 482 as shownin FIG. 8. Thus, wireless signals received by the transceiver of module430 from the wireless transceiver carried by plug 450 are processed bysignal-processing circuitry in module 430 and are communicated tostation 482 via cable 476. Furthermore, signals received by module 430from station 482 via cable 476 are processed by the signal-processingcircuitry in module 430 and are transmitted wirelessly from thetransceiver of module 430 to the transceiver carried by plug 450. In theillustrative example, connector 448 is a 22-pin Phillips™ styleconnector.

Module 430 has a first auxiliary connector 458 which is accessiblethrough a first port 462 on the front of housing 432 and a secondauxiliary connector 460 which is accessible through a second port 464 onthe front of housing 432 as shown in FIG. 9. Connector 458 is configuredto mate with an appropriately configured connector at the end of a cordextending from any bed, or other device, that does not have a plug 450and associated circuitry which permits wireless communication withmodule 430. Thus, when such a cord is connected to connector 458 a wiredcommunications link is established between module 430 and the associateddevice. Connector 460 is configured to mate with an appropriatelyconfigured connector at the end of a cord extending from a hand-heldpendant that is used by a patient to control room functions (e.g.,temperature and lighting, such as light 466), entertainment functions(e.g., TV and radio), nurse call functions, and/or bed functions. Such acord extending from a hand-held pendant may be coupled to connector 460to establish a wired communication link with module 430 simultaneouslywith, or in lieu of, the wireless communications link between module 430and plug 450.

Referring now to FIGS. 11 and 12, an alternative embodiment of acommunication module 480 includes a housing 484 and a power outlet 486into which a power-and-data plug, such as plug 20 of cable assembly 39,may be plugged to receive power and to communicate wirelessly withcircuitry of the outlet module 480. Module 480 has circuitry that isconfigured to communicate wirelessly with circuitry 24 carried by plug20. Communication module 480 is sometimes referred to herein as the“outlet module.” A data cable 494 extends from outlet module 480 andcouples either to a network of the healthcare facility or to a wallmodule like module 74 described above.

Outlet 486 is accessible on the front of housing 484 and has sockets 488into which prongs 32, 34, 36 of plug 20 may be inserted. Module 480 hasthree electrical contact members 490, two of which are shown in FIG. 12(in phantom), that are plugged into a wall outlet 429 to receive powerand ground from outlet 492. Power and ground received from outlet 492 bycontact members 490 is coupled to electrical contacts in receptacles 488by suitable electrical conductors. In some embodiments, power and groundreceived from outlet 492 by contact members 490 is coupled to thecircuitry of module 480 after any appropriate processing such asconversion from AC power to suitable DC voltage levels. Thus, module 480is an adapter which provides power to, and wireless communication with,devices having a cable assembly with a plug like plug 20 that haswireless communication capability and that is coupled to outlet 486 ofmodule 480.

In some embodiments, housing 484 carries circuitry corresponding tocircuitry 68 of module 26, described above, and corresponding tocircuitry 172 of module 74, described above. In other embodiments,housing 484 carries circuitry corresponding to circuitry 68 but does nothave circuitry corresponding to circuitry 172. This disclosurecontemplates that module 480 may have any type of circuitry capable tocommunicating wirelessly with wireless communications circuitry of anassociated plug. Module 480 has a nurse call cancel button 496 whichoperates similarly to button 132 of module 26. In addition, module 480has an LED 498 which operates similarly to LED 134 of module 26.

In the illustrative example, housing 484 is sized and configured to fitover a standard electrical outlet cover plate (not shown). Module 480has a window or lens 500 at the bottom of an overhanging portion 502 ofhousing 484. Portion 502 protrudes away from the main portion of housing484 by a sufficient amount to allow a wireless transceiver of module 480to be aimed toward a wireless transceiver of the associated plug thatcouples to outlet 486. Lens 500 is transmissive to the wireless signalscommunicated between the transceiver of module 480 and the transceiverof the plug coupled to outlet 486 of module 480. In the illustrativeembodiment, module 480 has a bed indicia 504 on the front of housing 484beneath outlet 486.

In the above examples, outlet modules 26, 430, 480 are mounted adjacentpower outlets that are coupled to walls of associated hospital rooms. Itwill be appreciated that power outlets are sometimes provided on othertypes of equipment in hospital rooms and therefore, module 26, 430, 480may be mounted to any such equipment having power outlets. For example,in an alternative arrangement shown in FIG. 13, outlet module 26 ismounted adjacent a power outlet provided on a piece of architecturalequipment 510. While the illustrative architectural equipment 510comprises a headwall unit having multiple power outlets 512 and gasoutlets 514, it is within the scope of this disclosure for modules 26,430, 480 to be coupled to other types of architectural equipment suchas, for example, bed locators, service columns, service chases, flatwall systems, carts, arms, and so forth. Wall module 74 may be coupledto these various types of architectural equipment as well. However, inthe example shown in FIG. 13, module 74 is omitted and module 26communicates with the network via a data cable 516. Data cable 516terminates at a connector 518 which couples to a data port of interface80. Wired link 84 between interface 80 and patient station 82 situatedin interior spaces of headwall unit 510.

Because some embodiments described herein have a short-range wirelesslink between device 22 and an associated outlet module, such as one ofmodules 26, 430, 480, there is little probability, if any, that wirelesssignals to and/or from one device 22 will get communicated to an outletmodule designated for another device in such embodiments havingshort-range wireless links. In these embodiments, therefore, anassociation between a particular bed and a particular location in ahealthcare facility may be made without any manual entry of data bycaregivers.

To associate a particular bed to a particular outlet module and/or to aparticular wall module (i.e., communication module), which correspondsto a particular location in a healthcare facility, a unique identifieror address is assigned to each communication module and a uniqueidentifier, such a serial number, is assigned to each device 22. Theunique identifiers of the communication modules are stored in memory ofthe circuitry of each associated communication module and the uniqueidentifiers for devices 22 are stored in the memory of devices 22.

In response to a wireless communications link being established betweena particular device 22 and a particular module 26, 430, 480, the uniqueidentifiers are exchanged between devices 22 and one or more of modules26, 74, 430, 480 and, in some embodiments, are transmitted to thenetwork For example, when sensor 98 senses the proximity of magnet 110,one of the associated module 26, 74, 430, 480 sends a query orinterrogation signal to the associated device 22 and the associateddevice responds with its unique identifier which is stored in memory ofthe module 26, 74, 430, 480. As a result of being queried, each device22 sends an interrogation signal to one or more of the associated module26, 74, 430, 480 and the associated module 26, 74, 430, 480 respondswith its unique identifier. Alternatively, the unique identifier of eachmodule 26, 74, 430, 480 may be transmitted along with its initialinterrogation signal for storage in the memory of the associated device22.

In some embodiments, the unique identifiers of devices 22 and modules26, 74, 430, 480 are communicated only once in response to the initialwireless coupling of a particular device 22 to an associated module 26,74, 430, 480. In other embodiments, the unique identifiers of devices 22and modules 26, 74, 430, 480 are communicated periodically. In stillother embodiments, the unique identifiers of devices 22 and modules 26,74, 430, 480 are communicated as part of every packet sent by devices 22and modules 26, 74, 430, 480. A computer device of the network, such asa Master Nurse Station computer, may keep track of the associationbetween each of devices 22 and the corresponding module 26, 74, 430,480. Such a computer device may also associate device 22 and/or thecorresponding module 26, 74, 430, 480 to other data, such as thepatient, caregiver(s) or doctor(s) assigned to the particular device 22.Once device 22, modules 26, 74, 430, 480, and any other computer devicesof the network are programmed appropriately, the various associationsdescribed above are monitored automatically without the need forcaregivers to enter any data or provide any other commands to anydevices of the network.

Although each of illustrative modules 26, 430, 480 couple to or mountover the associated power outlet, it is within the scope of thisdisclosure for modules 26, 430, 480 to be mounted elsewhere. Forexample, modules 26, 430, 480 may mount to other portions of the wallsto which the associated outlets are mounted, either above, below orbeside the outlets, or modules 26, 430, 480 may mount to other portionsof the architectural equipment, or any other structures for that matter,that are in the vicinity of the associated power outlets.

Although certain embodiments have been described in detail above,variations and modifications exist within the scope and spirit of thisdisclosure as described and as defined in the following claims.

The invention claimed is:
 1. A hospital bed for use in a healthcarefacility having an Ethernet and a room module, the hospital bedcomprising a first communication module providing a wirelessbi-directional audio link and a wireless bi-directional data link withthe room module, and a second communication module configured forwireless communication with the Ethernet.
 2. The hospital bed of claim1, wherein the second module is also configured for wired communicationwith the Ethernet.
 3. The hospital bed of claim 1, further comprising abed control module to control at least one bed function.
 4. The hospitalbed of claim 1, wherein the at least one bed function includes at leastone or more of the following: raising and lowering an upper frame of thebed relative to a base frame of the bed, tilting the upper frame of thebed relative to the base frame, raising and lowering a head section of amattress-support deck of the bed, raising and lowering a foot sectionand/or a thigh section of the mattress-support deck of the bed,operating a weigh system of the bed, operating a patient positionmonitoring (PPM) system of the bed, inflating or deflating air bladdersincluded in the mattress of the bed, or adjusting the volume of aspeaker.
 5. The hospital bed of claim 1, further comprising a bedspeaker to play audio received over the wireless bi-directional audiolink.
 6. The hospital bed of claim 4, wherein the audio received overthe wireless bi-direction audio link comprises television audio or radioaudio.
 7. The hospital bed of claim 1, wherein the first communicationmodule is operable to send control signals to the room module over thewireless bi-directional data link to control one or more roomenvironment functions.
 8. The hospital bed of claim 7, wherein thecontrol signals include one or more of the following: room light controldata indicating whether a room light should be turned on or off;television (TV) control data indicating whether a TV should be turned onor off, whether a TV channel should be changed up or down, whether TVvolume should be changed up or down; radio control data indicatingwhether a radio should be on or off, whether a radio channel should bechanged up or down, whether radio volume should be changed up or down);or nurse call data.
 9. The hospital bed of claim 1, wherein the bedincludes a power cord terminating at a plug and the first communicationmodule includes circuitry in the plug.
 10. The hospital bed of claim 1,further comprising a connector configured to be coupled to a nurse callcable to establish wired communication with a nurse call system of thehealthcare facility.
 11. The hospital bed of claim 1, further comprisinga microphone to receive audio to be transmitted over the wirelessbi-directional audio link to the room module.
 12. The hospital bed ofclaim 1, wherein the first communication module is operable to sendalarm data to the room module over the wireless bi-directional datalink.
 13. The hospital bed of claim 12, wherein the alarm data comprisesone or more of the following: bed exit data indicative of a position ofa patient relative to the hospital bed, siderail down data indicative ofa siderail of the hospital bed being in a lowered position, or a nursecall alarm indicative that a patient has manipulated a nurse call inputof the hospital bed.
 14. The hospital bed of claim 1, wherein thewireless bi-directional audio link comprises infrared (IR) signals. 15.The hospital bed of claim 14, wherein the IR signals comprises frequencymodulated IR (FMIR) signals.
 16. The hospital bed of claim 15, whereinone of the FMIR signals is sent from the first communication module tothe room module and is modulated at a first carrier frequency and theother of the FMIR signals is sent from the room module to the firstcommunication module and is modulated at a second carrier frequencydifferent than the first carrier frequency.
 17. The hospital bed ofclaim 1, wherein the wireless bi-directional data link comprisesinfrared (IR) signals.
 18. The hospital bed of claim 17, wherein the IRsignals comprises frequency modulated IR (FMIR) signals.
 19. Thehospital bed of claim 18, wherein one of the FMIR signals is sent fromthe first communication module to the room module and is modulated at afirst carrier frequency and the other of the FMIR signals is sent fromthe room module to the first communication module and is modulated at asecond carrier frequency different than the first carrier frequency.